<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>浮动</title>
		<link href="css/boxsty.css" rel="stylesheet"
	</head>
	<body>
		<!--快速创建类名为box的盒子：标签名.box*个数>tab-->
		<div class="bigbox clearfix">
		<div class="box">box1</div>
		<div class="box"style="height:180px;">box2</div>
		<div class="box"style="height:240px;">box3</div>
		<div class="clear"></div>
		<!--<div class="box2">box4</div>-->
		</div>
		<div class="box2">box4</div>
	</body>
</html>
